Final answer:
The set of words that includes only words containing consonant digraphs and no blends is 'father, shin, reach.' Each of these words contains a consonant digraph like 'th' or 'sh', and none contains blends.
Step-by-step explanation:
The question deals with identifying which set or sets of words contain only consonant digraphs and not blends. A consonant digraph consists of two consonant letters that together make a single sound. Blends, however, are groups of two or more consonants where each letter's sound can be heard.
Let's examine each option provided:
- Father, shin, reach - 'th' in 'father' and 'sh' in 'shin' are digraphs. But 'ch' in 'reach' is a digraph too, so all are acceptable.
- Cheek, less, silk - 'ch' in 'cheek' is a digraph. However, 'less' contains a blend, so this set is not solely digraphs.
- Rough, phone, bang - 'ph' in 'phone' is a digraph. However, 'bang' contains a blend, so this set does not meet the criteria.
- Stripe, laugh, wish - 'stripe' contains a blend, thus failing the criteria.
Considering the rules set forth, the correct answer to the question, 'Which set(s) of words include only words that have consonant digraphs, and no words with blends?' is:
Set a: father, shin, reach